Rust: Difference between revisions

Revision as of 06:55, 19 February 2021

This article is about the Rust programming language. There are 3 methods to use the rust compiler and toolchain in Nix/NixOS: via nixpkgs, via rustup, or with unofficial overlays on nixpkgs. Installing via nixpkgs is the nix-iest way to use rust, but there are valid reasons to use any approach.

Installing via nixpkgs

The cargo and rustc derivations provide the rust toolchain in nixpkgs.

VSCode integration

The rust-lang.rust and matklad.rust-analyzer VSCode extensions offer rust support. Most of the

Installation via rustup

The rustup tool is maintained by the rust community and offers and interface to install and switch between rust toolchains. In this scenario, rustup handles the "package management" of rust toolchains and places them in $PATH. Nixpkgs offers rustup via the rustup derivation. More info on using rustup can be found on their official website: https://rustup.rs/.

Unofficial overlays

Rust Nightlies

Either use Rust overlay or rustup to get install Rust nightlies.

Neovim Completion

Racer completion can be configured using the following snippet:

(neovim.override {
  configure = {
    customRC = ''
      if filereadable($HOME . "/.vimrc")
        source ~/.vimrc
      endif
      let $RUST_SRC_PATH = '${stdenv.mkDerivation {
        inherit (rustc) src;
        inherit (rustc.src) name;
        phases = ["unpackPhase" "installPhase"];
        installPhase = ''cp -r library $out'';
      }}'
    '';
    packages.nixbundle.start = with vimPlugins; [
      nvim-completion-manager
      nvim-cm-racer
    ];
  };
})

@@ Line 2: / Line 2: @@
 == Installing via nixpkgs ==
-The <code>cargo</code> and <code>rustc</code> derivations provide the rust toolchain in nixpkgs. Here's an example <code>shell.nix</code>:
+The <code>cargo</code> and <code>rustc</code> derivations provide the rust toolchain in nixpkgs.
-<syntaxHighlight lang="nix">
-let
-  # Pinned nixpkgs, deterministic. Last updated: 2/12/21.
-  pkgs = import (fetchTarball("https://github.com/NixOS/nixpkgs/archive/a58a0b5098f0c2a389ee70eb69422a052982d990.tar.gz")) {};
-  # Rolling updates, not deterministic.
-  # pkgs = import (fetchTarball("channel:nixpkgs-unstable")) {};
-in pkgs.mkShell {
-  buildInputs = [ pkgs.cargo pkgs.rustc ];
-}
-</syntaxHighlight>
 === VSCode integration ===
+The [https://marketplace.visualstudio.com/items?itemName=rust-lang.rust rust-lang.rust] and [https://marketplace.visualstudio.com/items?itemName=matklad.rust-analyzer matklad.rust-analyzer] VSCode extensions offer rust support. Most of the
 == Installation via rustup ==